Work

Quantum Storage with Flat Bands

Year: 2025

Type: article

Abstract: The realization of robust quantum storage devices relies on the ability to generate long-lived, spatially localized states. In this Letter, we introduce a method for the targeted creation of compact excitations in flat-band lattices. By injecting in-plane radiation waves from the system's edge and applying a localized on-site potential at the desired storage position, we induce hybridization between compact localized states of the flat band and resonant dispersive plane waves. This hybridization enables the formation of spatially compact, stable excitations suitable for quantum memory applications. We experimentally validate this mechanism using photonic waveguide arrays, focusing on two representative geometries: the diamond chain and the one-dimensional Lieb ladder. Our approach is broadly applicable to any platform supporting flat-band physics.

Source: Physical Review Letters

DOI: 10.1103/7dfz-n1jh

Authors: Carlo Danieli, Jie Liu, Rudolf A. Römer, Rodrigo A. Vicencio

Institutions: Institute for Complex Systems, Central South University of Forestry and Technology, University of Warwick, University of Chile

Language: English

Topic: Quantum optics and atomic interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funders: Natural Science Foundation of Hunan Province, Ministero dell'Università e della Ricerca, Scientific Research Foundation of Hunan Provincial Education Department, Fondo Nacional de Desarrollo Científico y Tecnológico